when a large group of people attack a single person or a small group of people, usually innocent and unsuspecting, and beating him/them, sometimes to death, in a very violent and barbaric manner.
Lynch is a cowardly and disrespectful action, as the victim has no option of defending himself against the attackers, because they highly outnumber him.

As Jorge the Spanish-American was going home in the evening, a mob of Skin-Heads appeared from out of no-where, and started beating and stabbing him, then left him bleeding on the side-walk.

A long-lasting enmity between two gangs led to a lynch yesterday, when eight gang members lynched two members of another gang, beating them with baseball bats, killing one and causing the other serious injuries.